3 * copyright (c) 2007 Bobby Bingham
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 #include "allfilters.h"
30 /** list of registered filters */
34 struct FilterList *next;
37 /** helper macros to get the in/out pad on the dst/src filter */
38 #define link_dpad(link) link->dst-> input_pads[link->dstpad]
39 #define link_spad(link) link->src->output_pads[link->srcpad]
41 AVFilterPicRef *avfilter_ref_pic(AVFilterPicRef *ref, int pmask)
43 AVFilterPicRef *ret = av_malloc(sizeof(AVFilterPicRef));
46 ret->pic->refcount ++;
50 void avfilter_unref_pic(AVFilterPicRef *ref)
52 if(-- ref->pic->refcount == 0)
53 ref->pic->free(ref->pic);
57 void avfilter_insert_pad(unsigned idx, unsigned *count, size_t padidx_off,
58 AVFilterPad **pads, AVFilterLink ***links,
63 idx = FFMIN(idx, *count);
65 *pads = av_realloc(*pads, sizeof(AVFilterPad) * (*count + 1));
66 *links = av_realloc(*links, sizeof(AVFilterLink*) * (*count + 1));
67 memmove(*pads +idx+1, *pads +idx, sizeof(AVFilterPad) * (*count-idx));
68 memmove(*links+idx+1, *links+idx, sizeof(AVFilterLink*) * (*count-idx));
69 memcpy(*pads+idx, newpad, sizeof(AVFilterPad));
73 for(i = idx+1; i < *count; i ++)
75 (*(unsigned *)((uint8_t *)(*links[i]) + padidx_off)) ++;
78 int avfilter_link(AVFilterContext *src, unsigned srcpad,
79 AVFilterContext *dst, unsigned dstpad)
83 if(src->output_count <= srcpad || dst->input_count <= dstpad ||
84 src->outputs[srcpad] || dst->inputs[dstpad])
87 src->outputs[srcpad] =
88 dst->inputs[dstpad] = link = av_mallocz(sizeof(AVFilterLink));
92 link->srcpad = srcpad;
93 link->dstpad = dstpad;
99 static int common_format(int *fmts0, int *fmts1)
103 for(i = 0; fmts0[i] != -1; i ++)
104 for(j = 0; fmts1[j] != -1; j ++)
105 if(fmts0[i] == fmts1[j])
111 int avfilter_insert_filter(AVFilterLink *link, AVFilterContext *filt,
112 unsigned in, unsigned out)
114 av_log(NULL, AV_LOG_INFO, "auto-inserting filter '%s'\n",
117 link->dst->inputs[link->dstpad] = NULL;
118 if(avfilter_link(filt, out, link->dst, link->dstpad)) {
119 /* failed to link output filter to new filter */
120 link->dst->inputs[link->dstpad] = link;
124 /* re-hookup the link to the new destination filter we inserted */
127 filt->inputs[in] = link;
132 int avfilter_config_link(AVFilterLink *link)
134 int *fmts[3] = {NULL,NULL,NULL};
135 int (*config_link)(AVFilterLink *);
136 int *(*query_formats)(AVFilterLink *link);
138 AVFilterContext *scale;
139 AVFilterLink *link2 = NULL;
144 /* find a format both filters support */
145 if(!(query_formats = link_spad(link).query_formats))
146 query_formats = avfilter_default_query_output_formats;
147 fmts[0] = query_formats(link);
148 fmts[1] = link_dpad(link).query_formats(link);
149 if((link->format = common_format(fmts[0], fmts[1])) == -1) {
150 /* no common format found. insert scale filter to convert */
151 if(!(scale = avfilter_open(&avfilter_vf_scale, NULL)))
153 if(scale->filter->init(scale, NULL, NULL)) {
154 avfilter_destroy(scale);
157 if(avfilter_insert_filter(link, scale, 0, 0))
159 link2 = scale->outputs[0];
161 /* now try again to find working colorspaces.
162 * XXX: is it safe to assume that the scale filter always supports the
163 * same input and output colorspaces? */
164 fmts[2] = scale->input_pads[0].query_formats(link);
165 link->format = common_format(fmts[0], fmts[2]);
166 link2->format = common_format(fmts[1], fmts[2]);
173 if(link->format == -1 || (link2 && link2->format == -1)) {
175 link->dst = link2->dst;
176 link->dstpad = link2->dstpad;
177 link->dst->inputs[link->dstpad] = link;
179 avfilter_destroy(scale);
185 if(!(config_link = link_spad(link).config_props))
186 config_link = avfilter_default_config_output_link;
187 if(config_link(link))
190 if(!(config_link = link_dpad(link).config_props))
191 config_link = avfilter_default_config_input_link;
192 if(config_link(link))
196 if(!(config_link = link_spad(link2).config_props))
197 config_link = avfilter_default_config_output_link;
198 if(config_link(link2))
201 if(!(config_link = link_dpad(link2).config_props))
202 config_link = avfilter_default_config_input_link;
203 if(config_link(link2))
210 AVFilterPicRef *avfilter_get_video_buffer(AVFilterLink *link, int perms)
212 AVFilterPicRef *ret = NULL;
214 if(link_dpad(link).get_video_buffer)
215 ret = link_dpad(link).get_video_buffer(link, perms);
218 ret = avfilter_default_get_video_buffer(link, perms);
223 int avfilter_request_frame(AVFilterLink *link)
225 if(link_spad(link).request_frame)
226 return link_spad(link).request_frame(link);
227 else if(link->src->inputs[0])
228 return avfilter_request_frame(link->src->inputs[0]);
232 /* XXX: should we do the duplicating of the picture ref here, instead of
233 * forcing the source filter to do it? */
234 void avfilter_start_frame(AVFilterLink *link, AVFilterPicRef *picref)
236 void (*start_frame)(AVFilterLink *, AVFilterPicRef *);
238 if(!(start_frame = link_dpad(link).start_frame))
239 start_frame = avfilter_default_start_frame;
241 /* prepare to copy the picture if it has insufficient permissions */
242 if((link_dpad(link).min_perms & picref->perms) != link_dpad(link).min_perms ||
243 link_dpad(link).rej_perms & picref->perms) {
244 av_log(link->dst, AV_LOG_INFO,
245 "frame copy needed (have perms %x, need %x, reject %x)\n",
247 link_dpad(link).min_perms, link_dpad(link).rej_perms);
249 link->cur_pic = avfilter_default_get_video_buffer(link, link_dpad(link).min_perms);
250 link->srcpic = picref;
253 link->cur_pic = picref;
255 start_frame(link, link->cur_pic);
258 void avfilter_end_frame(AVFilterLink *link)
260 void (*end_frame)(AVFilterLink *);
262 /* unreference the source picture if we're feeding the destination filter
263 * a copied version dues to permission issues */
265 avfilter_unref_pic(link->srcpic);
269 if(!(end_frame = link_dpad(link).end_frame))
270 end_frame = avfilter_default_end_frame;
275 void avfilter_draw_slice(AVFilterLink *link, int y, int h)
277 uint8_t *src[4], *dst[4];
278 int i, j, hsub, vsub;
280 /* copy the slice if needed for permission reasons */
282 avcodec_get_chroma_sub_sample(link->format, &hsub, &vsub);
284 src[0] = link->srcpic-> data[0] + y * link->srcpic-> linesize[0];
285 dst[0] = link->cur_pic->data[0] + y * link->cur_pic->linesize[0];
286 for(i = 1; i < 4; i ++) {
287 if(link->srcpic->data[i]) {
288 src[i] = link->srcpic-> data[i] + (y >> vsub) * link->srcpic-> linesize[i];
289 dst[i] = link->cur_pic->data[i] + (y >> vsub) * link->cur_pic->linesize[i];
291 src[i] = dst[i] = NULL;
293 for(j = 0; j < h; j ++) {
294 memcpy(dst[0], src[0], link->cur_pic->linesize[0]);
295 src[0] += link->srcpic ->linesize[0];
296 dst[0] += link->cur_pic->linesize[0];
298 for(i = 1; i < 4; i ++) {
299 if(!src[i]) continue;
301 for(j = 0; j < h >> vsub; j ++) {
302 memcpy(dst[i], src[i], link->cur_pic->linesize[i]);
303 src[i] += link->srcpic ->linesize[i];
304 dst[i] += link->cur_pic->linesize[i];
309 if(!link_dpad(link).draw_slice)
312 link_dpad(link).draw_slice(link, y, h);
315 AVFilter *avfilter_get_by_name(char *name)
317 struct FilterList *filt;
319 for(filt = filters; filt; filt = filt->next)
320 if(!strcmp(filt->filter->name, name))
326 void avfilter_register(AVFilter *filter)
328 struct FilterList *newfilt = av_malloc(sizeof(struct FilterList));
330 newfilt->filter = filter;
331 newfilt->next = filters;
335 void avfilter_init(void)
337 avfilter_register(&avfilter_vf_crop);
338 avfilter_register(&avfilter_vf_fifo);
339 avfilter_register(&avfilter_vf_fps);
340 avfilter_register(&avfilter_vf_graph);
341 avfilter_register(&avfilter_vf_graphdesc);
342 avfilter_register(&avfilter_vf_graphfile);
343 avfilter_register(&avfilter_vf_negate);
344 avfilter_register(&avfilter_vf_overlay);
345 avfilter_register(&avfilter_vf_passthrough);
346 avfilter_register(&avfilter_vf_scale);
347 avfilter_register(&avfilter_vf_slicify);
348 avfilter_register(&avfilter_vf_split);
349 avfilter_register(&avfilter_vf_vflip);
352 void avfilter_uninit(void)
354 struct FilterList *tmp;
356 for(; filters; filters = tmp) {
362 static int pad_count(const AVFilterPad *pads)
364 AVFilterPad *p = (AVFilterPad *) pads;
367 for(count = 0; p->name; count ++) p ++;
371 static const char *filter_name(void *p)
373 AVFilterContext *filter = p;
374 return filter->filter->name;
377 AVFilterContext *avfilter_open(AVFilter *filter, char *inst_name)
379 AVFilterContext *ret;
384 ret = av_malloc(sizeof(AVFilterContext));
386 ret->av_class = av_mallocz(sizeof(AVClass));
387 ret->av_class->item_name = filter_name;
388 ret->filter = filter;
389 ret->name = inst_name ? av_strdup(inst_name) : NULL;
390 ret->priv = av_mallocz(filter->priv_size);
392 ret->input_count = pad_count(filter->inputs);
393 ret->input_pads = av_malloc(sizeof(AVFilterPad) * ret->input_count);
394 memcpy(ret->input_pads, filter->inputs, sizeof(AVFilterPad)*ret->input_count);
395 ret->inputs = av_mallocz(sizeof(AVFilterLink*) * ret->input_count);
397 ret->output_count = pad_count(filter->outputs);
398 ret->output_pads = av_malloc(sizeof(AVFilterPad) * ret->output_count);
399 memcpy(ret->output_pads, filter->outputs, sizeof(AVFilterPad)*ret->output_count);
400 ret->outputs = av_mallocz(sizeof(AVFilterLink*) * ret->output_count);
405 void avfilter_destroy(AVFilterContext *filter)
409 if(filter->filter->uninit)
410 filter->filter->uninit(filter);
412 for(i = 0; i < filter->input_count; i ++) {
413 if(filter->inputs[i])
414 filter->inputs[i]->src->outputs[filter->inputs[i]->srcpad] = NULL;
415 av_freep(&filter->inputs[i]);
417 for(i = 0; i < filter->output_count; i ++) {
418 if(filter->outputs[i])
419 filter->outputs[i]->dst->inputs[filter->outputs[i]->dstpad] = NULL;
420 av_freep(&filter->outputs[i]);
423 av_freep(&filter->name);
424 av_freep(&filter->input_pads);
425 av_freep(&filter->output_pads);
426 av_freep(&filter->inputs);
427 av_freep(&filter->outputs);
428 av_freep(&filter->priv);
429 av_freep(&filter->av_class);
433 int avfilter_init_filter(AVFilterContext *filter, const char *args, void *opaque)
437 if(filter->filter->init)
438 if((ret = filter->filter->init(filter, args, opaque))) return ret;
442 int *avfilter_make_format_list(int len, ...)
447 ret = av_malloc(sizeof(int) * (len + 1));
449 for(i = 0; i < len; i ++)
450 ret[i] = va_arg(vl, int);